If you start doom in tty1 and then switch into tty2; In tty2 you start kde.
When you kill sdoom from kde, the system goin krash.
I don't know what sort of problem it's bug produce!
Are you sure it's causing a complete crash, and not just a display lockup?
SVGALib and XFree86 have never played too well together (and they can't).
I don't know if its a screen lookup, but when it occur i resolve with reboot,
if you have some key combination to verify it, please send me.
Hitting ctrl-alt-f1/f2/f3 etc. might help.
How did you kill sdoom? In general, doing kill -9
of something that has direct control of the graphics
card & keyboard is a *bad* idea.
closed, lack of input.